The MMDT2222ATB6 _R1_00001 from Panjit Semiconductor is a Bipolar Junction Transistor with Emitter Base Voltage 6 V, Base Emitter Saturation Voltage 0.6 to 2 V, Collector Base Voltage 75 V, Collector Cut off Current 10 nA, Collector Emitter Breakdown Voltage 40 V. Tags: Surface Mount, NPN Transistor. More details for MMDT2222ATB6 _R1_00001 can be seen below.